These are intense, brilliant colors, produced from dyes surrounded by a polymer coating. Because fluorescent colors are transparent, greater intensity is achieved by applying them over bright white surfaces. Fluorescent colors are not lightfast. For permanency, a topcoat of GOLDEN MSA Varnish with UVLS is recommended, although varnish and top coats will eliminate the fluorescent glow under black light. Details:Available in multiple colors4 fl. oz. (118 ml) jar